Abstract
As a result of revision of herbarium specimens of buttercups and data analysis of collected samples and field observations, the new data on distribution of the endemic plant of Altai Ranunculus schischkinii (Ranunculaceae Juss.) have been revealed. From the positions of the administrative boundaries, R. schischkinii, previously known from several habitats only within the Russian sector of the Altai Mountains, is now a new species for the flora of Kazakhstan. Information on all known locations of this species is given for the first time. Specific features of the environmental confinement of the species, original herbarium voucher labels indicating a place of storage, including new data, as well as the taxonomic position of the species and a reference to its original description are provided. The paper contains 3 Figures and 18 References.
Highlights
Ranunculus schischkinii Revushkin (Ranunculaceae Juss.) - Shishkin’s Meadow buttercup (Fig. 1) is an endemic species, known only from few locations in humid highlands of the Altai Mountains, which grows exclusively on overly moistened nival meadows, in mossy and grassy tundra (Fig. 2). This is the only species within the Altai Mountain Country, confined to the alpine belt in its altitudinal distribution within the Acres Prantl subsection of the genus Ranunculus L., which includes predominantly forest species
On the list of endemic plants of the Altai [1], published on a full scale for the first time in 2008 within the framework of the Darwin Initiative’s project “Cross-border conservation strategies in the Altai Mountains (Russia, Mongolia, Kazakhstan)”, the species is listed as Vulnerable in the neo-endemic category only for Shebalinskiy and Ongudai districts of the Altai Republic, Russia
The data summarizing the results of phylogeny and biogeography studies of the genus Ranunculus as a large cosmopolitan taxon confirm the hypothesis of congruence of karyotypes to the main clades of Ranunculus [4], and a high probability of regional adaptive diversification of species [5], which is more clearly manifested in mountainous regions, and testify to the autochthonous origin of R. schischkinii
Summary
Ranunculus schischkinii Revushkin (Ranunculaceae Juss.) - Shishkin’s Meadow buttercup (Fig. 1) is an endemic species, known only from few locations in humid highlands of the Altai Mountains, which grows exclusively on overly moistened nival meadows, in mossy and grassy tundra (Fig. 2). This is the only species within the Altai Mountain Country, confined to the alpine belt in its altitudinal distribution within the Acres Prantl subsection of the genus Ranunculus L., which includes predominantly forest species. The data summarizing the results of phylogeny and biogeography studies of the genus Ranunculus as a large cosmopolitan taxon confirm the hypothesis of congruence of karyotypes to the main clades of Ranunculus [4], and a high probability of regional adaptive diversification of species [5], which is more clearly manifested in mountainous regions, and testify to the autochthonous origin of R. schischkinii
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